contaminated marine sediments
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2022 ◽  
Vol 806 ◽  
pp. 150708
Author(s):  
Alessia Avona ◽  
Marco Capodici ◽  
Daniele Di Trapani ◽  
Maria Gabriella Giustra ◽  
Pietro Greco Lucchina ◽  
...  

Géotechnique ◽  
2021 ◽  
pp. 1-41
Author(s):  
Francesca Sollecito ◽  
Michael Plötze ◽  
Alexander M. Puzrin ◽  
Claudia Vitone ◽  
Daniela Miccoli ◽  
...  

A detailed multi-scale investigation of the geotechnical, chemical and mineralogical properties was conducted on contaminated sediment samples collected within the Mar Piccolo, a marine basin in south of Italy. The basin is located close to one of the most important industrial sites in Europe also declared ‘at high risk of environmental crisis’ and prioritised for remediation activities. A multidisciplinary investigation campaign showed that the samples collected close to the seafloor are characterized by high values of both heavy metals and organic pollutants and by the presence of significant amount of organic matter. Several samples in the top layer exhibited peculiar geotechnical properties, in terms of plasticity and activity indexes, compressibility and hydraulic permeability. While the prime suspect for such unconventional behaviour was the chemo-mechanical coupling between soil skeleton and contaminants, it turned out that the biogeochemical degradation of organic matter and the presence of microfossils and diatoms is likely to affect significantly the micro to macro behaviour of polluted marine sediments.


2021 ◽  
Author(s):  
Genevieve D’Avignon ◽  
Irene Gregory-Eaves ◽  
Anthony Ricciardi

Microplastics—plastic particles in the size range of planktonic organisms—have been found in the water columns and sediments of lakes and rivers globally. The number and mass of plastic particles drifting through a river can exceed those of living organisms such as zooplankton and fish larvae. In freshwater sediments, concentrations of microplastics reach the same magnitude as in the world’s most contaminated marine sediments. Such particles are derived from a unique biogeochemical cycle that ultimately influences productivity, biodiversity, and ecosystem functioning. Furthermore, microplastics act as vectors of toxic substances to invertebrates, fishes, herpetofauna, and waterfowl. We contend that the concentration of this distinct particle component is an ecologically significant parameter of inland waterbodies because of its ubiquity, environmental persistence, and interactions with key ecological processes. No environmental field survey that has searched for microplastics has yet failed to detect their presence. Standardized limnological protocols are needed to compare spatio-temporal variation in the concentration of microplastics within and across watersheds. Data obtained from such protocols would facilitate environmental monitoring and inform policy for managing plastic waste; furthermore, they would enable more accurate modeling of contaminant cycling and the development of a global plastic budget that identifies sources, distribution and circulation pathways, reservoir size and retention times.


2021 ◽  
Vol 13 (15) ◽  
pp. 8520
Author(s):  
Francesco Pasciucco ◽  
Isabella Pecorini ◽  
Simona Di Gregorio ◽  
Fabiano Pilato ◽  
Renato Iannelli

This study performed a Life Cycle Assessment (LCA) on recovery strategies of dredged contaminated marine sediments in a large Mediterranean port located in central Italy (Tuscany) in order to find the most environmentally sound solution. The study considered marine sediments polluted by potentially toxic elements (PTEs) and/or organic compounds, two different sediment particle sizes and the combined use of three soil remediation technologies: soil washing, electrokinetic treatment and enhanced landfarming. The analyzed scenarios depended on the sediment properties and characteristics of the treatment technologies investigated, and were compared with the corresponding reference scenarios, consisting of the landfilling of dredged contaminated sediments. The LCA results show that scenarios associated with sediment recovery generated potential environmental impacts lower than the corresponding reference scenarios. Almost all the impact categories considered in the CML-IA baseline method showed an environmental convenience in the recovery of contaminated sediments, especially for abiotic depletion and global warming. Future studies should focus on optimizing the combined use of multiple technologies and reducing the resource consumptions related to their implementation in order to achieve both environmental and economic benefits.


2021 ◽  
Vol 9 (6) ◽  
pp. 1279
Author(s):  
Grazia Cecchi ◽  
Laura Cutroneo ◽  
Simone Di Di Piazza ◽  
Giovanni Besio ◽  
Marco Capello ◽  
...  

Contamination of marine sediments by organic and/or inorganic compounds represents one of the most critical problems in marine environments. This issue affects not only biodiversity but also ecosystems, with negative impacts on sea water quality. The scientific community and the European Commission have recently discussed marine environment and ecosystem protection and restoration by sustainable green technologies among the main objectives of their scientific programmes. One of the primary goals of sustainable restoration and remediation of contaminated marine sediments is research regarding new biotechnologies employable in the decontamination of marine sediments, to consider sediments as a resource in many fields such as industry. In this context, microorganisms—in particular, fungi and bacteria—play a central and crucial role as the best tools of sustainable and green remediation processes. This review, carried out in the framework of the Interreg IT-FR Maritime GEREMIA Project, collects and shows the bioremediation and mycoremediation studies carried out on marine sediments contaminated with ecotoxic metals and organic pollutants. This work evidences the potentialities and limiting factors of these biotechnologies and outlines the possible future scenarios of the bioremediation of marine sediments, and also highlights the opportunities of an integrated approach that involves fungi and bacteria together.


2021 ◽  
Vol 164 ◽  
pp. 112082
Author(s):  
Joyce Álvarez-Barragán ◽  
Cristiana Cravo-Laureau ◽  
Lukas Y. Wick ◽  
Robert Duran

Chemosphere ◽  
2020 ◽  
Vol 260 ◽  
pp. 127576 ◽  
Author(s):  
Pietro P. Falciglia ◽  
Lucia Lumia ◽  
Maria Gabriella Giustra ◽  
Erica Gagliano ◽  
Paolo Roccaro ◽  
...  

2020 ◽  
Vol 162 ◽  
pp. 105101
Author(s):  
A. Dell'Anno ◽  
F. Beolchini ◽  
C. Corinaldesi ◽  
A. Amato ◽  
A. Becci ◽  
...  

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